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Cheap flights from Ontario to Duluth from $374

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Duluth departing on 8/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Ontario to Duluth

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
1:06 pm - 10:41 pm
ONT
-
DLH
7h 35m
2 stops
Delta Logo
4:11 pm - 11:34 pm
DLH
-
ONT
9h 23m
2 stops
$374Delta
Mon, Aug 10 - Wed, Aug 19
Delta Logo
1:06 pm - 10:41 pm
ONT
-
DLH
7h 35m
2 stops
Delta Logo
4:11 pm - 11:34 pm
DLH
-
ONT
9h 23m
2 stops
$375Delta
Mon, Aug 10 - Wed, Aug 19
United Airlines Logo
6:36 pm - 10:44 am
ONT
-
DLH
14h 08m
2 stops
United Airlines Logo
11:26 am - 6:29 pm
DLH
-
ONT
9h 03m
1 stop
$483United Airlines
Tue, Nov 3 - Sat, Nov 7
United Airlines Logo
6:36 pm - 10:44 am
ONT
-
DLH
14h 08m
2 stops
United Airlines Logo
7:35 am - 8:06 pm
DLH
-
ONT
14h 31m
2 stops
$488United Airlines
Tue, Nov 3 - Sat, Nov 7
United Airlines Logo
6:46 am - 5:32 pm
ONT
-
DLH
8h 46m
1 stop
United Airlines Logo
11:26 am - 6:29 pm
DLH
-
ONT
9h 03m
1 stop
$566United Airlines
Tue, Nov 3 - Sat, Nov 7
Delta Logo
1:06 pm - 10:41 pm
ONT
-
DLH
7h 35m
2 stops
Delta Logo
5:15 am - 12:16 pm
DLH
-
ONT
9h 01m
2 stops
$570Delta
Mon, Aug 10 - Tue, Aug 18
Delta Logo
1:06 pm - 10:41 pm
ONT
-
DLH
7h 35m
2 stops
Delta Logo
5:15 am - 12:16 pm
DLH
-
ONT
9h 01m
2 stops
$571Delta
Mon, Aug 10 - Tue, Aug 18
United Airlines Logo
9:15 am - 11:22 pm
ONT
-
DLH
12h 07m
2 stops
United Airlines Logo
3:11 pm - 10:35 pm
DLH
-
ONT
9h 24m
1 stop
$597United Airlines
Tue, Aug 11 - Tue, Aug 18
United Airlines Logo
9:15 am - 11:22 pm
ONT
-
DLH
12h 07m
2 stops
United Airlines Logo
7:45 am - 6:11 pm
DLH
-
ONT
12h 26m
2 stops
$602United Airlines
Tue, Aug 11 - Tue, Aug 18
United Airlines Logo
7:00 am - 5:34 pm
ONT
-
DLH
8h 34m
1 stop
United Airlines Logo
7:45 am - 6:12 pm
DLH
-
ONT
12h 27m
2 stops
$633United Airlines
Sat, Aug 15 - Sat, Aug 22

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United Airlines flights from Ontario to Duluth

Our best United Airlines deals on Ontario to Duluth flight tickets
United Airlines
Nov 3
ONT6:36 pmOntario
14h 08m
2 stops
DLH10:44 amDuluth Intl
Nov 7
DLH11:26 amDuluth Intl
9h 03m
1 stop
ONT6:29 pmOntario
$483
United Airlines
Nov 3
ONT6:36 pmOntario
14h 08m
2 stops
DLH10:44 amDuluth Intl
Nov 7
DLH7:35 amDuluth Intl
14h 31m
2 stops
ONT8:06 pmOntario
$488
United Airlines
Nov 3
ONT6:46 amOntario
8h 46m
1 stop
DLH5:32 pmDuluth Intl
Nov 7
DLH11:26 amDuluth Intl
9h 03m
1 stop
ONT6:29 pmOntario
$566

Delta flights from Ontario to Duluth

Our best Delta deals on Ontario to Duluth flight tickets
Delta
Aug 10
ONT1:06 pmOntario
7h 35m
2 stops
DLH10:41 pmDuluth Intl
Aug 19
DLH4:11 pmDuluth Intl
9h 23m
2 stops
ONT11:34 pmOntario
$374
Delta
Aug 10
ONT1:06 pmOntario
7h 35m
2 stops
DLH10:41 pmDuluth Intl
Aug 19
DLH4:11 pmDuluth Intl
9h 23m
2 stops
ONT11:34 pmOntario
$375
Delta
Aug 10
ONT1:06 pmOntario
7h 35m
2 stops
DLH10:41 pmDuluth Intl
Aug 18
DLH5:15 amDuluth Intl
9h 01m
2 stops
ONT12:16 pmOntario
$570

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Duluth that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated June 27, 2026.
Use the filters below to find and compare flights from Ontario to Duluth that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioDuluth

ONT - DLH

ONTDLH

Ontario

Mon 8/10

1:06 pm-10:41 pm

2 stops7h 35m

Duluth Intl

Wed 8/19

4:11 pm-11:34 pm

2 stops9h 23m

$374

OntarioDuluth

ONT - DLH

ONTDLH

Ontario

Mon 8/10

1:06 pm-10:41 pm

2 stops7h 35m

Duluth Intl

Wed 8/19

4:11 pm-11:34 pm

2 stops9h 23m

$375

OntarioDuluth

ONT - DLH

ONTDLH

Ontario

Tue 11/3

6:36 pm-10:44 am

2 stops14h 08m

Duluth Intl

Sat 11/7

11:26 am-6:29 pm

1 stop9h 03m

$483

OntarioDuluth

ONT - DLH

ONTDLH

Ontario

Tue 11/3

6:36 pm-10:44 am

2 stops14h 08m

Duluth Intl

Sat 11/7

7:35 am-8:06 pm

2 stops14h 31m

$488

OntarioDuluth

ONT - DLH

ONTDLH

Ontario

Tue 11/3

6:46 am-5:32 pm

1 stop8h 46m

Duluth Intl

Sat 11/7

11:26 am-6:29 pm

1 stop9h 03m

$566
Quickest round-trip

OntarioDuluth

ONT - DLH

ONTDLH

Ontario

Mon 8/10

1:06 pm-10:41 pm

2 stops7h 35m

Duluth Intl

Tue 8/18

5:15 am-12:16 pm

2 stops9h 01m

$570

OntarioDuluth

ONT - DLH

ONTDLH

Ontario

Mon 8/10

1:06 pm-10:41 pm

2 stops7h 35m

Duluth Intl

Tue 8/18

5:15 am-12:16 pm

2 stops9h 01m

$571

OntarioDuluth

ONT - DLH

ONTDLH

Ontario

Tue 8/11

9:15 am-11:22 pm

2 stops12h 07m

Duluth Intl

Tue 8/18

3:11 pm-10:35 pm

1 stop9h 24m

$597

OntarioDuluth

ONT - DLH

ONTDLH

Ontario

Tue 8/11

9:15 am-11:22 pm

2 stops12h 07m

Duluth Intl

Tue 8/18

7:45 am-6:11 pm

2 stops12h 26m

$602

OntarioDuluth

ONT - DLH

ONTDLH

Ontario

Sat 8/15

7:00 am-5:34 pm

1 stop8h 34m

Duluth Intl

Sat 8/22

7:45 am-6:12 pm

2 stops12h 27m

$633

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
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See travel insights to Duluth from

How to get the cheapest flight ticket from Ontario to Duluth

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Ontario to Duluth Intl?

United Airlines is the most popular carrier operating from Ontario to Duluth Intl

When to book flights from Ontario to Duluth

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Duluth according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Duluth (ONT to DLH) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Duluth

Fastest flight time

7h 35m

Direct flights

None
The fastest flight from Ontario to Duluth takes 7h 35m
There are no direct flights from Ontario to Duluth. There are no popular flight routes from Ontario to Duluth.
Search flight deals

Frequently asked questions about flying from Ontario to Duluth

  • How far is Ontario to Duluth Intl by plane?

    Duluth Intl is 1593.1 mi away from Ontario. Typically, this will take 7h 35m by plane in normal conditions.

  • When did momondo last update prices for flights from Ontario Airport to Duluth Intl Airport?

    Prices for flights from Ontario Airport to Duluth Intl Airport were last updated today.

  • How old do you have to be to fly from Ontario Airport to Duluth Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Duluth Intl Airport.

  • What documentation or ID do you need to fly to Duluth Intl Airport?

    The travel and health documents required for your trip to Duluth Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Duluth Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near Duluth?

Book flights to Duluth if you plan to visit one of these locations
Two Harbors
Superior
Cloquet
Hayward

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Duluth?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Duluth from Ontario.

Can I find flights from Ontario to Duluth with flexible booking policies on momondo?

All flight searches from Ontario to Duluth on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Ontario to Duluth?

Once you have performed a search for Ontario to Duluth flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Ontario to Duluth right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Ontario to Duluth flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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